Here it is, as I brought it home. Day 1 $130 1984 ATC that had been left and forgotten.
I hosed it off and brought it in. I pulled the rear fender to wash it and the gas tank was full of rusty water, so I took it off too.
I checked for spark, which looked good and not having a compression tester small enough for the engine. I put the plug back in, sprayed some starting fluid into the carb and gave it a kick. Nothing......
I went the next day and got a compression tester that fit and was getting 50-60psi. I had already downloaded the manual here and 60psi isn't enough. Still hoping I'd get lucking and find something easier to fix, I checked the valves, cam and timing. Everything seemed to be in order. A friend suggested that I put some oil in the cylinder and re-try the compression test. If it increases the pressure the definably rings. I did and it did, up to 125psi and tear down it was. Unlike my KX's, I couldn't get the head off with the engine is. If there is a way and I just didn't figure it out, LMK. Everything came apart good, I followed directions from the manual (this is the first time I've ever rebuilt and engine myself, at least one with valves) and I don't want to mess anything up. I've been around allot of engines being build but watching and doing is a big difference. Everything looked good, some wear in the cam, rockers and where the cam rides in the head but the piston and rings were done. Here's the pics of the engine stuff.
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